Chapter 8. Assembler Directives

63

8.81.

.single flonums

This directive assembles zero or more flonums, separated by commas. It has the same effect as

.float

. The exact kind of floating point numbers emitted depends on how

as

is configured. Chapter

9 Machine Dependent Features.

8.82.

.size

This directive is used to set the size associated with a symbol.

8.82.1. COFF Version

For COFF targets, the

.size

directive is only permitted inside

.def

/

.endef

pairs. It is used like

this:

.size expression

.size

is only meaningful when generating COFF format output; when

as

is generating

b.out

, it

accepts this directive but ignores it.

8.82.2. ELF Version

For ELF targets, the

.size

directive is used like this:

.size name , expression

This directive sets the size associated with a symbol

name

. The size in bytes is computed from

expression

which can make use of label arithmetic. This directive is typically used to set the size

of function symbols.

8.83.

.sleb128 expressions

sleb128

stands for "signed little endian base 128." This is a compact, variable length representation

of numbers used by the DWARF symbolic debugging format.

.uleb128

.

8.84.

.skip size, fill

This directive emits

size

bytes, each of value

fill

. Both

size

and

fill

are absolute expressions.

If the comma and

fill

are omitted,

fill

is assumed to be zero. This is the same as

.space

.

8.85.

.space size, fill

This directive emits

size

bytes, each of value

fill

. Both

size

and

fill

are absolute expressions.

If the comma and

fill

are omitted,

fill

is assumed to be zero. This is the same as

.skip

.